looks like it would take a proprietary bracelet or strap
+1. Take the bracelet off and find out, but I agree with Cynikal here.
And you could use one of those online rulers that formats itself to your monitor/resolution, if you're really in a pinch.
Buy one of these from a local hardware store or online for 10$ or so
Place on strap or between lugs on watch like this.
Read number on dial.
Job done!
Sent from my iPhone because I'm such a addict I have to keep on here even when I'm not home.
Is the lug size usually half of the case size? Say 40mm Sub, lug is 20mm; 42mm explorer, 21mm lug.